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No, I hear you, and I'm very much interested in aerodynamics. I just don't know how to go about photographing a car at highway speeds using this technique.
The only Schlieren photos I've seen are of dramatic aero events, like shock waves and sneezes. The result is 2D, and it really would take 3D to properly illustrate the aerodynamic defects of my car, like the side mirrors.
A virtual wind tunnel is where it's at. I'd love to set one up. I don't know OpenFOAM, but if you figure out how to toss a SolidWorks model into OpenFOAM or some other software package, and get a Cd out of it, I'll whip up a 3D model of a car with and without mirrors, with and without side skirts, with smooth wheels, etc. Actually, this paragraph has been kicking around in my head for a few months, and it's probably worthy of its own thread.
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